Determination of gaze calibration parameters

A computing device for determining a set of gaze calibration parameters for gaze estimation of a viewer using an eye-tracking system, wherein the eye-tracking system is associated with a candidate set of gaze calibration parameters, the computing device comprising:

• a processor;
• and
• a memory comprising instructions executable by the processor whereby the computing device is operative to:
• a) obtain a set of data points at at+ least one point in time, wherein the data points include gaze tracking data of the viewer and position information of at least one target visual that may attract the gaze of the viewer at said at least one point in time;
• b) select a first subset of said obtained set of data points;
• c) determine a set of gaze calibration parameters using said first subset of obtained set of data points;
• d) determine a score for the determined set of gaze calibration parameters by using the set of gaze calibration parameters with a second subset of said obtained set of data points, wherein at least one of the data points in the second subset of data points is not included in the first subset of data points, wherein the score is indicative of the capability of the set of gaze calibration parameters to reflect the position information of the at least one target visual based on the gaze tracking data;
• e) compare the score for the set of gaze calibration parameters to a stored candidate score;
• and
• f) if the score is higher than the stored candidate score, set the set of gaze calibration parameters to the candidate set of gaze calibration parameters and the score to the candidate score.

Computer program, comprising instructions which, when executed on at least one processor, cause the at least one processor to carry out the method comprising:

• a) obtaining a set of data points at at least one point in time, wherein the data points include gaze tracking data of the viewer and position information of at least one target visual that may attract the gaze of the viewer at said at least one point in time;
• b) selecting a first subset of said obtained set of data points;
• c) determining a set of gaze calibration parameters using said first subset of obtained set of data points;
• d) determining a score for the determined set of gaze calibration parameters by using the set of gaze calibration parameters with a second subset of said obtained set of data points, wherein at least one of the data points in the second subset of data points is not included in the first subset of data points, wherein the score is indicative of the capability of the set of gaze calibration parameters to reflect the position information of the at least one target visual based on the gaze tracking data;
• e) comparing the score for the set of gaze calibration parameters to a stored candidate score;
• and
• f) if the score is higher than the stored candidate score, setting the set of gaze calibration parameters to the candidate set of gaze calibration parameters and the score to the candidate score.